Horlick Formation lithofacies 2 (Devonian of Antarctica)

Where: Antarctica (84.8° S, 115.0° W: paleocoordinates 34.6° S, 175.6° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Horlick Formation, Early/Lower Devonian (419.2 - 393.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; burrowed, bioturbated sandstone and mudstone

• The marine lithofacies 1-8 are interpreted as "shallow inner shelf to shoreline, where storms produced a changing pattern of coarse sand bars and finer troughs." Lithofacies 2 interpreted as "middle shoreface on the sides of subtidal sand bars"
• "Coarse, poorly sorted quartzose or feldspathic sandstones, sometimes with a calcareous cement, and strongly bioturbated, with layers of Pleurothyrella shells; interbedded with thin mudstones; vertical and U-shaped burrows common"

Collection methods: Taxa are listed as Present, Abundant, Rare.

Primary reference: M. A. Bradshaw and L. McCartan. 1991. Palaeoecology and systematics of Early Devonian bivalves from the Horlick Formation, Ohio Range, Antarctica. Alcheringa 15(1):1-42 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 35560: authorized by Michael Foote, entered by Michael Foote on 21.12.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Modiomorphida - Modiomorphidae
 Solenida - Orthonotidae
 Protobranchia - Malletiidae
Nuculites frigidus n. sp. clam
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Rhynchonellata
 Terebratulida - Meganterididae
 Rhynchonellida -
Lingulata
 Lingulida - Disciniidae
 Lingulida - Lingulidae
Lingula sp. BruguiƩre 1797